| Model NO. | underground |
| Installation and Connection | Electric fusion Connection |
| Technology of Plastic Composite Pipe | Internal and External Coating |
| Base Pipe of Plastic Composite Pipe | Welded Steel Pipe |
| Internal Coating Materials of Plastic Composite Pipe | Polyethylene Coating Steel Pipe |
| Plastic Composite Pipe Coating Form | Inner and Outside Coating |
| Steel Skeleton PE Pipe Use | Municipal, Chemical, Oil Pipeline, Mining |
| Diameter | 20-1200 mm |
| Max Nominal Pressure | 15MPa |
| Oxidation Induction Time | Above 40min |
| Nominal Strain at Fracture | ≥400% |
| Tensile Yield Stress | ≥21MPa |
| Ash Content | ≤0.08% |
| Volatile Content | ≤350mg/Kg |
| Resistant to Slow Crack Growth | 80℃,500h,No Crack ; No Leakage |
| Density | Above 930kg/M3 |
| Color | Black, White, Green, Orange, Blue, Yellow |
| Transport Package | by Truck, by Train, by Sea |
| Trademark | DHPI |
| Origin | China |
| HS Code | 7303009000 |
| Production Capacity | 500000 Kilometers /Year |
Product Description

Underground flame retardant colored steel pipe is a specialized type of piping designed for underground applications where safety and durability are paramount. This pipe is constructed using high-quality steel materials coated with a flame retardant layer, providing excellent protection against fire hazards. Additionally, the colored outer layer enhances visibility, making it ideal for underground installations where identification and safety are essential. With its robust construction and flame retardant properties, this pipe is widely used in various industries such as mining, construction, and infrastructure development. It offers reliable performance and long-lasting durability, making it a preferred choice for underground piping systems in challenging environments.
Connection Method


Our Advantages
1. Durability: Constructed from high-quality steel materials, the pipe offers excellent durability and resistance to corrosion, ensuring long-term performance in underground applications.
2. Fire Safety: The flame retardant properties of the pipe's coating provide enhanced protection against fire hazards, reducing the risk of fire-related incidents in underground environments.
3. Visibility: The colored outer layer of the pipe enhances visibility, making it easier to identify and locate the pipe in underground installations, thus improving safety and facilitating maintenance.
4. Versatility: Underground flame retardant colored steel pipe is suitable for a wide range of applications, including mining, construction, and infrastructure projects, offering versatile solutions for various underground piping needs.
5.Compliance: The pipe meets stringent safety standards and regulatory requirements for underground installations, providing peace of mind to operators and ensuring compliance with industry regulations.
6. Cost-Effectiveness: Despite its advanced features and superior performance, the pipe remains cost-effective compared to alternative piping materials, offering value for money over the entire lifecycle of the installation.

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